Well, Counter-Burn strategies usually need card draw effects to keep themselves with answers in hand, and especially to get the amount of burn needed to actually finish out a game
they force you to play certain cards to make them good, increasing variety and propping up fun and unique cards and decks
For example, if the third mode is chosen three times, and you control Heliod, Sun-Crowned (a creature with the ability "Whenever you gain life, put a +1/+1 counter on target creature or enchantment you control."), Heliod's ability will trigger three times, for a total of three +1/+1 counters
First, cast Thornbite Staff for two generic mana, and then pay the four generic to equip it onto Marrow-Gnawer
Storm, cascade, chaos, and copying spells are all very Chaos-like
Just avoid those situations where you can help it